Oxygen cutting burner apparatus



Nbv. 3, 1931. L, J, HANC K 1,830,539

OXYGEN GUTTING BURNER APPARATUS Filed Oct. 15. 1930 2 Sheets-Sheet 2 //VVE/V70A7 ZJZ/Vaacac/g 19y ATTORNEY Patented Nov. 3, 1931 UNITEi? STATES.

LESLIE J 'OHN HANCOCK, OF SUTTON, ENGLAND OXYGEN CUTTING BURNER, APPARATUS Application filed October 13, 1930, Serial No. 488,429, and in Great Britain October 15, 1929.

This invention relates to flame cutting burner apparatus wherein a burner is steadily or uniformly impelled over a workpiece by the inertia or momentum of a rotary memher or members geared to a driving or travelling wheel supporting the burner.

The present invention enables hand or foot produced impulses to be transmitted regularly and smoothly to the rotary member or i members above referred to and the invention consists in interposing a free-wheel coupling and a flexible transmission between the said rotary member or members and a hand or foot operated means for driving the member or members.

In a preferred form of the invention a hand operated driving means comprises a pair of handles that are joined at one end and are connected intermediately to the ends of two links joined together toggle fashion. The middle joint of the toggle has one end of a Bowdencable secured to it and the other end of the cable is secured to the pawl or equivalent of the free-wheel coupling. When the jointed handles are closed the middle joint of the toggle pulls the cable proper and the pawl transmits an impulse to the rotary member. Upon release of the handles conveniently positioned springs on the handles and adjacent the free wheel coupling return the pawl, cable and handles ready for the next impulse, the flexible Bowden cable failing to transmit all movements of the handles except closing and opening ones.

The invention applied to a suitable attach-v ment is illustrated by way of example in the accompanying drawings in which:

Fig. 1 is a side View of the said attachment from the right of Figure 2 with parts of the cover and train of wheels therein removed:

Fig. 2 is an end vertical section on the line IIII of Fig. 1, the said omitted cover and wheels being in place:

Fig. 3 is an end vertical section on the line 'IIIIII of Fig. 1 with the cover and wheels in place:

Fig. 4 is a side view of the free wheel coup ling more particularly and Fig. 5 illustrates a preferred form of hand grip.

In this example the attachment is impelled by the actions of gripping and releasing handles 11 so that the handles close and open on a hinge 2 and in turn close and open a toggle 3-3 connected to them intermediate their pivoted ends and their free ends. When the toggle closes a link 4: forming the middle joint thereof is forced away from the pivot 2 and pulls the cable proper 5 of a Bowden cable 6 because one end of the cable is secured to the link 4:. The ends of the case of the Bowden cable are connected to the handles 11 and the housing 7 of the attachment by nipples 8 and 9 respectively and the cable proper is thereby conducted from the handles to the interior of the attachment after passing through the pivoted ends of the said handles. That end of the cable 5 within the attachment is fixed to a block 10 and when the handles pull the cable the block 10, a pawl 11 pivoted to the block and pivoted at 12 between two discs 13-18, are pulled in a clockwise direction (Fig. 4) and-the tip of the pawl carries a ratchet wheel 14 round with it. The ratchet wheel turns a shaft 15 on which it. is mounted and the shaft, through a spur wheel 16 and a multiplying gear train l7, 18, 19 sets a flywheel 20 into rotation on bearings 20 on the shaft 15. The impulse of theratchet wheel is conveyed also to a driving wheel 21 adjacent a clamp 22 for a burner 23 through a gear train comprising a pinion 24 on the shaft 15 and inter-driving gearing 25, 26, 27 and 28, the wheel 28 being rigid with the wheel21. Thus after the f rst 1H1- pulse of the ratchet wheel the drive is continued by the flywheel and the burner is impelled over the workpiece steadily, the rat chet wheel over-running the pawl 11.

Upon release of the handles 11 they andthe toggle open under the actionof a tension spring 29 between the nipple 8 and the link a so that the'cable 5 returns, the return of the cable and the consequent 'return of the pawl, inoperativelywith respect to the wheel 11, being assisted by a helical spring 30 secured at one end 31 toone of the discs 13 and at the other end to the case'of the attachment at 32. The discs l3-13 are borne freelyrotatable by bosses on the sides of the ratchet wheell; and a shaft 33 on which the wheels 17 18 and 26 are mounted, and the shaft 16, are borne by bearings 34; in the casing of the attachment. The casing comprises two dished plates 3536, one of which, 36, supports two track rollers 37-37 and is provided with means for securing a jockey wheel 38 and a counterweight 39 to it for use when the track rollers are idle. The jockey wheel 38 trails and is secured in the same vertical plane as the rollers 37.

A guard plate 40 is preferably arranged at one side of the spring 30.

What I claim is 2- Y 1. In flame cutting burner apparatus, a burner, travelling wheels supporting the burner, a rotary member having appreciable inertia, driving means for imparting momentum to the rotary member, a driving connection between the member and a travelling wheel, and uni-directional coupling and a flexible transmission between the said memher and the said driving means.

2. In flame cutter burner apparatus, a

" i burner, travelling wheels supporting the burner, a rotary member having appreciable inertia, driving means for imparting momentum to the rotary member, a drivingconnection between the member and a travelling wheel, and a uni-directionalcoupling and a flexible transmission comprising a Bowden cable between the said member and the said driving means.

3. In flame cutting burner apparatus, a burner, travelling wheels supporting the burner, a train of gear wheels in driving connection with one of the travelling wheels, driving means for imparting momentum to the train of gear wheels, and a uni-direct onal coupling and a flexible transmission between the said train of wheels and the said driving means. I

4. In flame cutting burner apparatus, a burner, travelling wheels supporting the v burner, a train of gear wheels in driving connection with one of the travelling wheels, a

ratchet wheel in fixed co-axial relation to one ofthe gear wheels of the train, a reciprocatory pawl meshing with the ratchet wheel, a Bowden cable connected with the pawl, and

means for reciprocating the cable properof the said Bowden cable. 5. In flame cutting burner apparatus a burner, travelling wheels supporting the burner, a train of gear wheels in driving connect on with one of the travelling wheels, a ratchet wheel in fixed co-axial relation to one of the gear. wheels of the train, an oscillatory pawl meshing with the ratchet wheel, a Bow den cable connected with the pawl, means for moving in one direction thecable proper of the said Bowden cable, and spring means for restoring the said cable proper.

6. In flame cutting burner apparatus, a

burner, travelling wheels supporting A the t sqtt burner, a rotary member having appreciable inertia, a driving connection between the member and a travelling wheel, driving means for imparting momentum to the said member comprising a pair of levers pivoted together near one end, a toggle with its end pivoted to opposite levers at points intermediate their pivoted ends and their free ends, a Bowden cable connected at one end with the middle joint of the toggle, a pawl connected with the other end of the cable, and a ratchet wheel on the rotary member.

7. In flame cutting burner apparatus a burner, travelling wheels. supporting the burner, a train of gear wheels in driving connection with one of the travelling wheels, and'driving means for imparting momentum to the said member comprising a pair of levers pivoted together near one end, a toggle with its end pivoted to opposite levers at points intermediate their pivoted ends and their free ends, a Bowden cable connected at one end with the middle joint of the toggle, a pawl connected with the other end of the cable, and a ratchet wheel on the rotary member.

8. In flame cutting burner apparatus, a burner, travelling wheels supporting the burner, a rotary member having appreciable inertia, driving means for imparting momentum to the rotary member, a driving connection between the member and a travelling wheel, a uni-directional coupling and a flexible transmission between the said member and the said driving means, a case for the whole, and a clamp on the case for attachment of the burner.

In testimony where-of I allix my signature.

LESLIE JOHN HANCOCK. 

